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H. S. GRANNIS. STOVE PIPE FORMER.

.Patentqd Sept. 1, 1891.

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H. S. GRANNIS. STOVE PIPE FORMER.

Patented Sept. 1, 1891.

35/ gzdl/mcd I iffy UNITED STATES PATENT OFFIcE.

HIAL S. GRANNIS, OF SOUTHlNGTON, CONNECTICUT, ASSIGNOR TO THE PECK, STOW& IVILCOX COMPANY, OF SAME PLACE.

STOVE-PIPE FORMER.

SPECIFICATION forming part of Letters Patent No. 458,683, datedSeptember 1, 1891.

Application filed March 11, 1891. Serial No. 384,566. (No model.)

To aZZ whom it may concern.-

Be it known that I, HIAL S. GRANNIS, a citizen of the United States,residing at South ington, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inStove-Pipe Formers, of which the following is a specification.

My invention relates to improvements in machines for forming stove-pipesand other sheet-metal cylinders; and the principal objects of myimprovement are to provide a convenient adjustment for the rear rollerthat permits the boxes or bearings for said roller to be adjusted onvertical ways and to pro- I 5 vide a vertical adjustment for the lowerroll that may be operated by a set-screw on the front side of themachine.

In the accompanying drawings, Figure 1 is a rear elevation of mymachine, the middle portion being broken away so as to shorten up therollers and connecting-rods. Fig. 2 is a transverse section through saidrollers and rods 011 line 00 x of Fig. 1, with a partial verticalsection of the left-hand frame on the right of said line when viewedfrom the rear,

as in Fig. 1. Fig. 3 is a partial vertical section of a portion of oneof the frames on line a of Fig. 2; and Fig. 4 is a horizontal section ofa portion of said frame on line y 3 of Fig.

0 2, together with a plan view of the lower end of the adjusting-lever.

I have herein shown my improvement as applied to whatis known as aslip-roller former of the class shown and described in my patent, No.402,582, dated May 7, 1889; but the improvements herein described andclaimed are equally applicable to ordinary stove-pipe formers in whichthe upper roller is not arranged for slipping the pipe or cylin- 0 derendwise from the machine.

A designates the right-hand frame, 13 the left-hand frame, and C C theconnecting-rods for holding said frames together in the ordinary manner.

D is the upper roller, E the lower roller, and F the rear roller. Theupper roller D may have its bearings formed in the frame in the ordinarymanner for either of the two classes of machines hereinbefore specified.The lower roller E has its hearings in a box 5, which is verticallyadjustable on ways 6 of the frame at each end of the machine. A verticalopening 7,Figs.2 and 3, extends from the opening between the ways 6 6downwardly through each of the frames. In the lower part of this openingis an angle-lever 8, formed with three lobes and pivoted to the frame bythe pin 9, as shown in Figs. 2 and 3. The front of the frame is boredthrough at a point in front of the angle-lever 8 and threaded to receivethe adj Listing-screw 10, which extends to the front of the machine, asshown. A sliding block 11 is placed under the box 5 and above the anglelever 8, so that by turning the horizontal adjusting-screw 10 theangle-lever will push said sliding block and the box 5, which rests uponit, upwardly to adjust that end of the roller E. Unscrewing the adjListing-screw will permit said box and roller to fall by gravity. Theother end of the roller is adjusted by like mechanism in the otherframe. The sliding block 11 is only for convenience of construction, andits equivalent may be produced by forming an extension integral with thelower end of the box 5. It is, however, more convenient to constructthis extension of a separate piece; butit makes no difference with theoperation.

The rear roller F is supported at each end in boxes 12, which move invertical ways 13 in each of the frames. Each frame is provided at itsrear with a holding-wing 14, the outer edge 15 of which is concentricwith the screw 10,by which the forked adjusting-lever G is pivoted toeach of the frames. The two arms of said lever extend downwardly uponeach side of the frame to a point below the box 12. The lower end ofthis lever is provided with a cross-piece 17, which is preferably in theform of a friction-roller, mounted on the pin 18 and which extendshorizontally through the opening in each frame underneath the box 12. Inthe outer end of the forked adj Listing-lever there is a shoe 19, thatbears upon the concentric face of the holding- 5 wing, which shoe isheld in place by a projection or boss 20, that enters the hole in theend of said lever. A set-screw 21 is screwed into said lever, so thatits end may bear upon the boss of the shoe. By loosening the set-screwIoo the adjusting lever may be turned downwardly at its outer end tothrow the box 12 and end of the roller F upwardly, or its motion may bereversed to permit said roller and box to fall, and when the roller isbrought to the desired height the adjusting-lever is fastened in placeby turning the set-screw 21 to bind the shoe 19 upon the edge of theholding-wing. A like lever is arranged upon each frame.

While I have shown the shoe as mounted in the end of said lever, it isevident that the lever might be fastened and unfastened by a longersetscrew that would bear directly upon the edge of the holding-wing, ora cam bearing on the shoe might be substituted for the screw, and eitherof such changes would not avoid my invention. By my invention the lowerone of the two front rollers may be adjusted vertically by means of ahorizontal set-screw at the front of the machine. I am also enabled toarrange the rear roller in boxes that are mounted upon vertical ways andto provide an efficient and quick ad justment of the'same.

I claim as my invention-- 1. In a former, the combination of the frameshaving vertically adjustable boxes 5, p

the lower roller E of the front rollers having its bearings in saidboxes, the adj usting-screws 10, and the angle-pieces 8 for transmittingthe motion of said adjusting-screws to said boxes, substantially asdescribed, and for the purpose specified.

2. In a former, the front rollers D E, the frames in which said rollersare mounted, having straight vertical ways at the rear of said frontrollers, the rear roller F, the boxes 12, arranged to slide in said rearvertical ways and within which boxes said rear roller is mounted, theadjusting-lever G for raising said rear boxes and rollers vertically,and holding mechanism, substantially as described, and for the purposespecified.

3. In a former, the combination of the frames, the rear roller F and itssliding boxes 12, the adjusting-levers G, pivoted to the frames andhaving a cross-piece extending under said boxes, and holding mechanismto fasten said levers in place, substantially as described, and for thepurpose specified.

HIAL S. GRANNIS.

\Vitnesses:

STEPHEN WALKLEY, E. M. STANNARD.

